Valve construction



. 1947- I R. o. MONROE ET AL 2,422,796

VALVE CONSTRUCTION Filed July 15, 1944 F/ELEQ v FHULLU ELMUNRUE JUHN WfT/EFPUNHMLJE gwwm.

Patented June 24, 1947 VALVE CONSTRUCTION Rollo 0. Monroe and John W. Hieronymus, Three Rivers, Mich., assignors to The Johnson Corporation, Three Rivers, Mich., a corporation of Michigan Application July 15, 1944, Serial No. 545,028

2 Claims.

The present invention relates to improvements in valve construction.

One of the objects of the present invention is to provide an improved fractional turned valve preferably using carbon graphite as a sealing medium seated under spring tension.

Another object of the invention is to provide a valve of the type described capable of handling steam and other higher temperature liquids in which the operating parts may be freely and easily manipulated.

Another object of the invention is to provide a carbon graphite valve which is inert to most fiuids and is characterized by its ability to maintain an efiicient seat in service.

A still further object of the invention is to provide a valve construction having the structural and functional advantages which become apparent from the following specification and claims.

In th drawing,

Fig. 1 is a vertical cross-sectional View of our improved valve construction, and

Fig. 2 is a cross-sectional view taken on line IIII of Fig. 1.

Referring to the drawing, the principles of construction of the present invention have been illustrated in connection with a valve l having a cast main body portion l2 with an inlet connection I4 and an outlet connection l6. Plates l8 and close'the upper and lower ends of the bore 22.

The plate I8 has a recess 24 in which the shaft 26 is received at its lower end. The upper end 28 of the shaft 26 is recessed at 30 and carries a cross pin 32. The central portion 34 of the shaft 26 is of reduced cross section having parallel sides 36 and 38. The molded carbon graphite sealing block 40 is mounted on a support 42 through a in 44. The support 42 is shown slotted at 46 to receive the reduced portion 34 of the shaft 26, being horizontally slidable relative thereto and constituting a driving connection between the shaft 26 and the mount 42. For resiliently urging the sealing block 40 against the wall of the bore 22 which defines a seat surrounding the outlet 48, a spring 50 is inserted in the slot 45 and is in a position to react against the restricted reduced portion 34.

Our improved valve stem, which may be em- 2 ployed for the rotation of valve parts other than that illustrated, consists of a shaft portion 52 extending through a bore 54 in the plate 20. The shaft 52 may be square to be received in a similarly shaped hole 56 in the handle 58. Shown integral with the shaft 52 is a spherical segment 60 below which extends the driver portion 62 which is forked at 64 to receive the drive pin 32.

The underside of the plate 20 is provided with a machine boss 66 surrounding the bore 54. The seal of the shaft 52 is preferably in the form of a carbon raphite ring 58 having upper and lower surfaces complementary with the surfac of the boss 66 and the spherical segment 60.

A coil spring 10 acting between the upper end of the shaft 26 and the underside of the spherical segment 60 resiliently urges the valve stem assembly upwardly to effect the seal between the sealing ring 68 and the surfaces associated therewith. The pin and slot connection defined by the parts 32 and 34 provides for relative axial movement of the valve stem to compensate for wear that may take place in the carbon graphite ring 68.

It will also be understood that fiuid pressure within the valve I0 will act in conjunction with the spring 10 to bring the surfaces of the parts 68 and 62 into sealing engagement with the corresponding complementary surfaces of the sealing ring 68. It should be apparent that the valve stem construction herein described necessitates a minimum amount of machining in its construction. It will be further appreciated that even under extremely high pressures and temperatures very little effort will be required to partially or completely rotate the shaft 52.

Having thus described our invention what we desire to claim as new and to cover by Letters Patent is:

1. In a valve structure having an inlet, an outlet, a cylindrical chamber and a wall in which the outlet and its seat are defined, a valve assembly comprising a rotatable shaft, a part disposed on said shaft in driving relation and relatively movable in a direction toward the seat, a carbon graphite seal having a surface complementary with said chamber and floating on said part, and resilient means interposed between said part and said shaft for resiliently urging said part and seal into engagement with said seat.

2. A quarter turn valve comprising a cylindrical chamber, an inlet opening into said chamber, an outlet opening from said chamber,. a seat surrounding said outlet and defined by the wall of said chamber, an operating shaft supported in said chamber, a carbon graphite seal having a surface complementary with th surface of said chamber and adapted to be moved toward and from sealing relation with said seat, a, part on which said carbon graphite seal is supported with floating action, means constituting a driving radially floating connection between: said part and said shaft, resilient'means interposed between said shaft and said part to continue to urge said seal toward the walls of said chamber and means for at least partially rotatingv said shaft and seal into and out of sealing relation with said seat and outlet.

ROLLQOI MNROE. JOHN 'W. 'HIERONYMUS.

REFERENCES CITED The following references are of record in the 5 file of this patent:

UNITED STATES PATENTS Number Certificate of Correction Patent N 0. 2,422,? 96. ROLLO O. MONROE ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Column 2, line 12, for "raphite read graphite and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case inthe Patent Office.

Signed and sealed-this 26th day of August,'-A. D. 1947.

[SEAL] LESLIE FRAZER,

First Assistant G'ommz'ssz'oner 0 f Patents.

June 24, 1947 

